Flat Roof Insulation Slope Layout

From there the flat roof system you choose will determine the materials you apply.

Flat roof insulation slope layout.

Roof insulation materials to avoid. The goal of tapered roof insulation systems is to eliminate ponding standing water on a membrane when the roof deck does not provide adequate slope. Some so called experts online may recommend the following claiming to achieve a greater r value at a lower cost. Tapered roof insulation and crickets are designed to provide effective drainage for epdm tpo pvc and built up bur membranes.

A note to consider before construction. To add a slight slope to an entirely flat roof to help shed water install tapered foam board insulation underneath a membrane roof. Save money by installing fiberglass insulation and framing out roof slope using osb board substrate. Flat over structural slope backwash detail backwash overlayed on adjacent flat over structural slope when roof drains are located a great distance away from a sloped roof edge more than 48 it can be more cost effective to use a tapered backwash.

If insulation is installed below the flat roof deck this is called a cold roof. The crickez system helps to simplify roof crickets with quicket. Tapered backwashes can also help reduce the insulation height at the roof edge. Polyiso xps and eps roof.